York YUHC 18, Service Manual, Page: 40 / 49

3. Clean
CAUTION: Please turn off your air conditioner and disconnect power supply before cleaning.
(1) CLEANING INDOOR UNIT
Use a dry to wipe the indoor unit.
A cloth dampened with cold water may be used if the indoor unit is too dirty.
It is allowed to remove the front panel of indoor unit and clean it with water, and ensure to wipe it up with a dry
rag.
Note: Do not use a chemically treated duster for wiping or leave such materials near the unit for long.
Do not use benzene, thinner, polishing powder, or similar solvents for cleaning.
(2) CLEANING AIR FILTER
The air filter in unit can filter dust and other granules in air. It may reduce the cooling effect that the air filter is
covered with dust. So clean the air filter often.